The Permission Number™: One Calculation That Changes How Retirement Feels.

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Paul had enough money to buy the tickets. That was what made the hesitation so frustrating. The trip had been on his mind for years — during his working life there was always a busy season, a project to finish, a better time ahead. Now he had the time, and the money was sitting in his accounts. Yet at the booking screen he kept returning to the same question: What if I need it later? Each time he answered one concern, another lifted its head. He could afford the trip today, but what about rising expenses? What if he withdrew just before a downturn? What if his health changed? By the time he had considered every possibility, closing the browser felt easier than deciding.

Paul is a fictional retiree from Retire REGAL®, but the moment is not fictional. If you have spent decades becoming a careful saver, you may recognize it. You can know the price of something and still feel uncertain about its cost to your future. That is the Income Hydra™ at work in its quietest form. It does not have to empty an account to win. It only has to keep you uncertain about using one.

Wealth Creates Potential. Income Creates Permission.

For most of our lives we are taught to measure financial progress numerically. A rising balance confirms discipline. Net worth becomes shorthand for security. Those measures answer an important question during the accumulation years: am I moving forward? As retirement approaches, the question quietly changes. The more relevant concern is no longer how much has been accumulated, but whether what has been built will support the life you want to live — consistently, calmly, and without constant second-guessing.

Many people reach retirement with far more than they expected and still feel uneasy. The unease comes from a question that wealth cannot answer on its own. Wealth offers potential. It does not offer permission. And in retirement, permission matters more than possibility.

Here is the mechanism. When retirement income depends primarily on market performance, every decision carries emotional weight. A withdrawal from an IRA feels different when markets are up than when they are down. Spending feels risky even when assets are substantial. Over time, confidence erodes — not because the plan has failed, but because the system leans too heavily on the retiree’s emotions to hold it together. Vacations are delayed. Enjoyment is rationed. Retirement becomes a series of trade-offs rather than a season of freedom. The money is there. The certainty is missing.

The Calculation

The license to spend is not something an advisor grants. It is something the structure creates. But it can be made concrete with a single calculation, and the calculation is simple enough to run at the kitchen table.

Start with your essential monthly expenses — the non-negotiable costs of daily life. Housing. Utilities. Insurance. Groceries. Healthcare premiums. Transportation. Some of these are easy to identify from a bank statement. Others take a little digging: the property-tax bill that arrives once or twice a year belongs in the picture, divided by twelve, and so do the expenses that tend to disappear from memory between payments. Write that number down.

Now write down how much stable, dependable income covers those expenses each month. Social Security. Pension payments. Annuity income. Interest from treasuries or CDs. Any source that does not depend on what the market did last week.

The relationship between those two numbers is the most important number in your retirement. If the second number exceeds the first, the surplus is your Permission Number™ — the margin within which every dollar spent is not drawn from growth assets, not dependent on market cooperation, and not a source of anxiety. That trip. That gift to the grandchildren. That dinner without the mental arithmetic.

One discipline keeps the number useful: the two figures must treat taxes the same way. Income after taxes, set against expenses that do not count those taxes again. The calculation is only as good as its reflection of your household as it is, not an optimistic version of it.

So Paul put the trip aside and looked at an ordinary month. His essential spending averaged $5,000. Social Security and his pension provided $4,400, and neither depended on the markets. That left $600 a month — $7,200 a year — that his savings had to supply before he could think about the trip. For the first time, his concern had a size. “Can I afford retirement?” is an enormous question. “How will I cover this $600 each month, and what else must my savings support?” is one he could examine.

What Counts as Dependable

The calculation depends on sorting income by its behavior, not by its label. Within the REGAL Stronghold™, the Foundation layer consists of income and assets that are not meant to rise and fall with markets: Social Security, pensions, government treasuries, CDs, and fixed annuities or guaranteed income strategies. None is unconditional. Benefits rest on law or contract, and the instruments are designed to return principal when held as intended, on the strength of whoever stands behind them. What defines this layer is predictability, ahead of yield or growth.

Dividend-paying stocks, income funds, and rental property produce real cash flow, and they have a defined place in the structure — the Walls, built for durability and insulation. They do not belong in the Permission Number™. Dividends can be cut. A dividend is part of an investment’s total return, not an addition to it, so spending one is not automatically safer than selling a share. Rental income depends on occupancy. Counting these sources as Foundation income overstates the floor and understates the margin for disappointment — which is exactly the kind of error the Hydra feeds on.

The same sorting applies to the expense side. The number is essential spending. Travel, gifts, and the discretionary life you are planning to enjoy are what the Permission Number™ is for; they do not go into the denominator.

What the Research Says About Spending

What is important — and validating — is that this is not just an idea that sounds right. Retirement income researchers David Blanchett and Michael Finke published their analysis of the phenomenon — and gave it its name — in a 2024 paper for the Alliance for Lifetime Income’s Retirement Income Institute, “Guaranteed Income: A License to Spend.” Their finding: retirees consistently spend significantly more from guaranteed income sources than from investment assets — roughly twice as much, by their estimate — even when the underlying value is the same. The reason is confidence. Income feels safe to spend. Assets feel conditional.

Yet few people act on it. A 2026 National Bureau of Economic Research review of the so-called annuity puzzle reports that roughly half of consumers say they would favor buying lifetime income to protect against outliving their savings, while only about 12 percent actually do. The review finds the barrier is often language as much as product design. In the classic framing experiment it draws on, guaranteed lifetime income presented in terms of the monthly consumption it would support was chosen by about 70 percent of participants. Presented instead as an investment — account values and returns — the figure fell to 21 percent. Nothing changed but the frame.

The review also notes that the case is rarely all-or-nothing. Partial annuitization — modest guaranteed income layered above Social Security while the rest stays liquid — balances access to savings against the security of lifetime income. That describes the Foundation layer almost exactly: never meant to hold everything, only enough.

A Surplus Is a Starting Point, Not a Finish Line

Even a surplus is a starting point. Repairs, future care, rising costs, and a long retirement still need their own answers, and the Permission Number™ does not pretend to supply them. That is the job of the rest of the Stronghold. The Walls exist to absorb impact and provide adaptive income — dividend growth, bond reinvestment, rental increases — that can help address rising costs over time. The Battlement holds the assets that sit outside routine spending, for the moments when choice matters: a market dislocation, a healthcare event, a tax-planning window.

A common objection to foundational income is inflation, and the objection is valid. A fixed income stream may not automatically increase each year, and over a long retirement purchasing power can decline. Foundational income is not intended to solve every risk on its own. It plays one role within a broader structure, and no single layer carries the entire responsibility. Resilience comes from coordination.

What the Permission Number™ does supply is the thing that was missing at the booking screen: a boundary. Inside it, spending is participation. Outside it, spending is a decision to be examined — which account, what it changes, what remains. Paul’s tickets were still waiting, but his question had become clearer. He needed to understand how his savings would meet the $600 gap, what had to remain available for other needs, and where travel belonged among his priorities.

If There Is a Gap

If essential expenses exceed stable income, treat it as a design question, not a crisis. It means the Foundation layer has room to grow, and it tells you how much. A $600 monthly gap is a different engineering problem than a $3,000 one, and both are more solvable than “I don’t know whether I can afford this.”

The tools for closing a gap are familiar, and they are not interchangeable. Social Security timing is the first lever for most households, because delaying a benefit raises a dependable, inflation-adjusted income for life — at the cost of drawing more from savings in the bridge years. A pension election, where one exists, is the second. Treasuries and CD ladders convert a portion of savings into predictable interest for a defined period. And for retirees who want to expand the base further, one approach sometimes used is a guaranteed income rider attached to a fixed index annuity, which turns part of savings into a stream of income defined by the terms of the contract, for one lifetime or for as long as either spouse is living.

Few words draw stronger reactions than “annuity,” and the reactions in both directions usually come from someone selling something. An annuity is a tool, and the useful question about any tool is whether it fits the job in front of you. Some contracts are expensive, some hold money behind surrender charges that do not fit a household’s liquidity needs, and some are sold to people who never needed them. Those are arguments about fit, cost, and conduct — reasons to choose with care, and sometimes reasons to walk away. Within the Stronghold an annuity is given one job: when it is the right fit, converting a portion of assets into income designed to function across varied market conditions, so the rest of the plan is freer to do what it does best. Sized to the structure and matched to the job, it can be a strong part of a plan. Bolted onto a plan it does not fit, it becomes the cautionary tale its critics cite. The difference is the fit.

If you have the book, its companion workbook, The Armory, runs this calculation on your own numbers as your Foundation coverage ratio, alongside the Social Security timing and conversion-window worksheets that move it.

The Principle Underneath

Security answers the question, Am I safe? Freedom answers a different one: Can I live the way I want without fear that today’s decisions will undermine tomorrow? A retiree can be well protected and still feel constrained — holding conservative investments and healthy balances, yet hesitating to act because they do not know how those assets are meant to behave under pressure. The Permission Number™ is where that distinction becomes concrete. It is the point at which the structure, rather than willpower, tells you what you are allowed to do.

Many people who calculate it find their relationship with spending changes — driven by new clarity rather than new wealth. The Hydra is still there. One of its heads is now in view, and a head you can see is a head you can design around. Paul eventually bought his tickets: a shorter trip than the one he first priced, and one he could explain. That is what the number is for.